AQSQID: 060371701

Site Name: Pomona

Location: Pomona, CA

Reporting: True, Located: True

Current AQI: 24.0

Pomona CA, US: 34.0667, -117.7506

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 22, 2019, 11 p.m. 19.4 ppb (18) 6.7 ppb (6) N/A 13.0 ppb (12) N/A N/A 31.0 ppb (24) 0.37 ppb (4) N/A N/A 24.0
 
March 22, 2019, 3 p.m. 38.3 ppb (35) 13.1 ppb (12) N/A 25.0 ppb (23) N/A N/A 15.0 ppb (12) 0.46 ppb (5) N/A N/A 35.0
 
March 22, 2019, 2 p.m. 46.9 ppb (43) 20.8 ppb (19) N/A 26.0 ppb (24) N/A N/A 5.0 ppb (4) 0.65 ppb (7) N/A N/A 43.0
 
March 22, 2019, 1 p.m. 35.4 ppb (33) 9.2 ppb (9) N/A 26.0 ppb (24) N/A N/A 3.0 ppb (2) 0.59 ppb (7) N/A N/A 33.0
 
March 22, 2019, noon 20.3 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A N/A 9.0 ppb (7) 0.38 ppb (4) N/A N/A 19.0
 
March 22, 2019, 11 a.m. 14.9 ppb (14) 0.2 ppb (0) N/A 15.0 ppb (14) N/A N/A 19.0 ppb (15) 0.28 ppb (3) N/A N/A 15.0
 
March 22, 2019, 10 a.m. 10.5 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) 0.27 ppb (3) N/A N/A 18.0
 
March 22, 2019, 9 a.m. 10.5 ppb (10) -0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.23 ppb (3) N/A N/A 19.0
 
March 22, 2019, 8 a.m. 9.4 ppb (9) -0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.24 ppb (3) N/A N/A 20.0
 
March 22, 2019, 7 a.m. 11.4 ppb (11) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A N/A 20.0
 
March 22, 2019, 6 a.m. 10.5 ppb (10) -0.2 ppb (0) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) 0.25 ppb (3) N/A N/A 21.0
 
March 22, 2019, 5 a.m. 11.9 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (11) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A N/A 20.0
 
March 22, 2019, 4 a.m. 13.3 ppb (12) 0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A 26.0 ppb (20) 0.27 ppb (3) N/A N/A 20.0
 
March 22, 2019, 3 a.m. 14.2 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 26.0 ppb (20) 0.27 ppb (3) N/A N/A 20.0
 
March 22, 2019, 2 a.m. 13.5 ppb (12) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A N/A 21.0
 
March 22, 2019, 1 a.m. 10.9 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) 0.25 ppb (3) N/A N/A 25.0
 
March 22, 2019, midnight 11.7 ppb (11) 1.7 ppb (2) N/A 10.0 ppb (9) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A N/A 27.0
 
March 21, 2019, 11 p.m. 10.5 ppb (10) 1.5 ppb (1) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A N/A 27.0
 
March 21, 2019, 10 p.m. 10.1 ppb (9) 1.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 36.0 ppb (28) 0.25 ppb (3) N/A N/A 28.0
 
March 21, 2019, 9 p.m. 9.8 ppb (9) 1.9 ppb (2) N/A 8.0 ppb (7) N/A N/A 36.0 ppb (28) 0.23 ppb (3) N/A N/A 28.0
 
March 21, 2019, 8 p.m. 10.5 ppb (10) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A N/A 26.0
 
March 21, 2019, 7 p.m. 12.3 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) 0.27 ppb (3) N/A N/A 25.0
 
March 21, 2019, 6 p.m. 13.6 ppb (13) 2.8 ppb (3) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A N/A 24.0
 
March 21, 2019, 5 p.m. 11.7 ppb (11) 2.1 ppb (2) N/A 10.0 ppb (9) N/A N/A 30.0 ppb (23) 0.25 ppb (3) N/A N/A 23.0
 
March 21, 2019, 4 p.m. 12.5 ppb (12) 1.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.24 ppb (3) N/A N/A 22.0
 
March 21, 2019, 3 p.m. 20.9 ppb (19) 3.9 ppb (4) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.33 ppb (4) N/A N/A 19.0
 
March 21, 2019, 2 p.m. 83.9 ppb (82) 43.8 ppb (41) N/A 40.0 ppb (37) N/A N/A 16.0 ppb (12) 0.5 ppb (6) N/A N/A 82.0
 
March 21, 2019, 1 p.m. 35.6 ppb (33) 10.6 ppb (10) N/A 25.0 ppb (23) N/A N/A 21.0 ppb (16) 0.29 ppb (3) N/A N/A 33.0
 
March 21, 2019, noon 9.1 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.23 ppb (3) N/A N/A 20.0
 
March 21, 2019, 11 a.m. 10.3 ppb (10) -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.22 ppb (2) N/A N/A 19.0
 
March 21, 2019, 10 a.m. 9.4 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) 0.25 ppb (3) N/A N/A 18.0
 
March 21, 2019, 9 a.m. 9.3 ppb (9) -0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) 0.24 ppb (3) N/A N/A 18.0
 
March 21, 2019, 8 a.m. 10.2 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 22.0 ppb (17) 0.26 ppb (3) N/A N/A 17.0
 
March 21, 2019, 7 a.m. 9.7 ppb (9) -0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.24 ppb (3) N/A N/A 21.0
 
March 21, 2019, 6 a.m. 18.1 ppb (17) 1.2 ppb (1) N/A 17.0 ppb (16) N/A N/A 20.0 ppb (15) 0.31 ppb (3) N/A N/A 17.0
 
March 21, 2019, 5 a.m. 22.6 ppb (21) 1.7 ppb (2) N/A 21.0 ppb (19) N/A N/A 14.0 ppb (11) 0.39 ppb (4) N/A N/A 21.0
 
March 21, 2019, 4 a.m. 22.6 ppb (21) 0.3 ppb (0) N/A 22.0 ppb (20) N/A N/A 14.0 ppb (11) 0.36 ppb (4) N/A N/A 21.0
 
March 21, 2019, 3 a.m. 33.3 ppb (31) 3.5 ppb (3) N/A 30.0 ppb (28) N/A N/A 12.0 ppb (9) 0.45 ppb (5) N/A N/A 31.0
 
March 21, 2019, 2 a.m. 18.7 ppb (17) 2.0 ppb (2) N/A 17.0 ppb (16) N/A N/A 25.0 ppb (19) 0.34 ppb (4) N/A N/A 19.0
 
March 21, 2019, 1 a.m. 11.3 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A N/A 26.0
 
March 21, 2019, midnight 12.8 ppb (12) 1.8 ppb (2) N/A 11.0 ppb (10) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A N/A 25.0
 
March 20, 2019, 11 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A N/A 27.0
 
March 20, 2019, 10 p.m. 13.0 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A N/A 33.0 ppb (25) 0.25 ppb (3) N/A N/A 25.0
 
March 20, 2019, 9 p.m. 15.7 ppb (15) 2.2 ppb (2) N/A 13.0 ppb (12) N/A N/A 30.0 ppb (23) 0.25 ppb (3) N/A N/A 23.0
 
March 20, 2019, 8 p.m. 13.8 ppb (13) 1.3 ppb (1) N/A 13.0 ppb (12) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A N/A 24.0
 
March 20, 2019, 7 p.m. 13.4 ppb (12) 1.4 ppb (1) N/A 12.0 ppb (11) N/A N/A 32.0 ppb (25) 0.23 ppb (3) N/A N/A 25.0
 
March 20, 2019, 6 p.m. 11.8 ppb (11) 2.3 ppb (2) N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) 0.22 ppb (2) N/A N/A 28.0
 
March 20, 2019, 5 p.m. 15.5 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) 0.27 ppb (3) N/A N/A 24.0
 
March 20, 2019, 4 p.m. 19.2 ppb (18) 4.0 ppb (4) N/A 15.0 ppb (14) N/A N/A 26.0 ppb (20) 0.28 ppb (3) N/A N/A 20.0
 
March 20, 2019, 3 p.m. 12.5 ppb (12) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.25 ppb (3) N/A N/A 22.0
 
March 20, 2019, 2 p.m. 23.1 ppb (21) 2.4 ppb (2) N/A 21.0 ppb (19) N/A N/A 19.0 ppb (15) 0.33 ppb (4) N/A N/A 21.0
 
March 20, 2019, 1 p.m. 17.4 ppb (16) 0.6 ppb (1) N/A 17.0 ppb (16) N/A N/A 21.0 ppb (16) 0.28 ppb (3) N/A N/A 16.0
 
March 20, 2019, noon 18.9 ppb (18) 0.9 ppb (1) N/A 18.0 ppb (17) N/A N/A 20.0 ppb (15) 0.29 ppb (3) N/A N/A 18.0
 
March 20, 2019, 11 a.m. 12.6 ppb (12) 0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 22.0 ppb (17) 0.22 ppb (2) N/A N/A 17.0
 
March 20, 2019, 10 a.m. 8.4 ppb (8) -0.6 ppb (0) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.2 ppb (2) N/A N/A 21.0
 
March 20, 2019, 9 a.m. 8.5 ppb (8) -0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) 0.18 ppb (2) N/A N/A 24.0
 
March 20, 2019, 8 a.m. 7.0 ppb (6) -0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) 0.18 ppb (2) N/A N/A 25.0
 
March 20, 2019, 7 a.m. 3.0 ppb (3) -0.7 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.16 ppb (2) N/A N/A 27.0
 
March 20, 2019, 6 a.m. 4.1 ppb (4) -0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.18 ppb (2) N/A N/A 27.0
 
March 20, 2019, 5 a.m. 5.8 ppb (5) -0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.2 ppb (2) N/A N/A 25.0
 
March 20, 2019, 4 a.m. 8.1 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) 0.23 ppb (3) N/A N/A 24.0
 
March 20, 2019, 3 a.m. 12.4 ppb (11) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.25 ppb (3) N/A N/A 22.0
 
March 20, 2019, 2 a.m. 10.3 ppb (10) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A N/A 25.0
 
March 20, 2019, 1 a.m. 9.5 ppb (9) 0.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A N/A 26.0
 
March 20, 2019, midnight 10.1 ppb (9) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 41.0 ppb (32) 0.26 ppb (3) N/A N/A 32.0
 
March 19, 2019, 11 p.m. 11.8 ppb (11) 1.8 ppb (2) N/A 10.0 ppb (9) N/A N/A 45.0 ppb (35) 0.26 ppb (3) N/A N/A 35.0
 
March 19, 2019, 10 p.m. 8.4 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 46.0 ppb (35) 0.24 ppb (3) N/A N/A 35.0
 
March 19, 2019, 9 p.m. 10.5 ppb (10) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A 46.0 ppb (35) 0.26 ppb (3) N/A N/A 35.0
 
March 19, 2019, 8 p.m. 12.8 ppb (12) 1.7 ppb (2) N/A 11.0 ppb (10) N/A N/A 46.0 ppb (35) 0.32 ppb (4) N/A N/A 35.0
 
March 19, 2019, 7 p.m. 19.0 ppb (18) 3.4 ppb (3) N/A 16.0 ppb (15) N/A N/A 42.0 ppb (32) 0.35 ppb (4) N/A N/A 32.0
 
March 19, 2019, 6 p.m. 27.5 ppb (25) 5.8 ppb (5) N/A 22.0 ppb (20) N/A N/A 37.0 ppb (28) 0.32 ppb (4) N/A N/A 28.0
 
March 19, 2019, 5 p.m. 35.1 ppb (32) 8.3 ppb (8) N/A 27.0 ppb (25) N/A N/A 32.0 ppb (25) 0.39 ppb (4) N/A N/A 32.0
 
March 19, 2019, 4 p.m. 68.2 ppb (65) 30.9 ppb (29) N/A 37.0 ppb (34) N/A N/A 19.0 ppb (15) 0.58 ppb (6) N/A N/A 65.0
 
March 19, 2019, 3 p.m. 114.4 ppb (103) 69.2 ppb (66) N/A 45.0 ppb (42) N/A N/A 5.0 ppb (4) 0.93 ppb (10) N/A N/A 103.0
 
March 19, 2019, 2 p.m. 73.6 ppb (71) 37.6 ppb (35) N/A 36.0 ppb (33) N/A N/A 3.0 ppb (2) 0.71 ppb (8) N/A N/A 71.0
 
March 19, 2019, 1 p.m. 78.4 ppb (76) 40.5 ppb (38) N/A 38.0 ppb (35) N/A N/A 2.0 ppb (2) 0.74 ppb (8) N/A N/A 76.0
 
March 19, 2019, noon 57.8 ppb (54) 22.2 ppb (21) N/A 36.0 ppb (33) N/A N/A 2.0 ppb (2) 0.58 ppb (6) N/A N/A 54.0
 
March 19, 2019, 11 a.m. 42.3 ppb (39) 8.7 ppb (8) N/A 34.0 ppb (31) N/A N/A 4.0 ppb (3) 0.43 ppb (5) N/A N/A 39.0
 
March 19, 2019, 10 a.m. 53.6 ppb (50) 15.5 ppb (14) N/A 38.0 ppb (35) N/A N/A 2.0 ppb (2) 0.53 ppb (6) N/A N/A 50.0
 
March 19, 2019, 9 a.m. 32.6 ppb (30) 1.2 ppb (1) N/A 31.0 ppb (29) N/A N/A 7.0 ppb (5) 0.43 ppb (5) N/A N/A 30.0
 
March 19, 2019, 8 a.m. 26.9 ppb (25) 1.3 ppb (1) N/A 26.0 ppb (24) N/A N/A 9.0 ppb (7) 0.43 ppb (5) N/A N/A 25.0
 
March 19, 2019, 7 a.m. 30.7 ppb (28) 1.0 ppb (1) N/A 30.0 ppb (28) N/A N/A 12.0 ppb (9) 0.48 ppb (5) N/A N/A 28.0
 
March 19, 2019, 6 a.m. 37.5 ppb (35) 2.5 ppb (2) N/A 35.0 ppb (32) N/A N/A 15.0 ppb (12) 0.42 ppb (5) N/A N/A 35.0
 
March 19, 2019, 5 a.m. 25.4 ppb (24) 1.0 ppb (1) N/A 24.0 ppb (22) N/A N/A 27.0 ppb (21) 0.36 ppb (4) N/A N/A 24.0
 
March 19, 2019, 4 a.m. 19.6 ppb (18) 0.5 ppb (0) N/A 19.0 ppb (18) N/A N/A 29.0 ppb (22) 0.35 ppb (4) N/A N/A 22.0
 
March 19, 2019, 3 a.m. 18.8 ppb (17) 0.4 ppb (0) N/A 18.0 ppb (17) N/A N/A 32.0 ppb (25) 0.34 ppb (4) N/A N/A 25.0
 
March 19, 2019, 2 a.m. 17.7 ppb (16) 0.4 ppb (0) N/A 17.0 ppb (16) N/A N/A 37.0 ppb (28) 0.33 ppb (4) N/A N/A 28.0
 
March 19, 2019, 1 a.m. 12.1 ppb (11) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A 46.0 ppb (35) 0.26 ppb (3) N/A N/A 35.0
 
March 19, 2019, midnight 12.3 ppb (11) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 50.0 ppb (38) 0.26 ppb (3) N/A N/A 38.0
 
March 18, 2019, 11 p.m. 10.3 ppb (10) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 54.0 ppb (42) 0.25 ppb (3) N/A N/A 42.0
 
March 18, 2019, 10 p.m. 10.3 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 59.0 ppb (45) 0.3 ppb (3) N/A N/A 45.0
 
March 18, 2019, 9 p.m. 20.0 ppb (19) 2.6 ppb (2) N/A 17.0 ppb (16) N/A N/A 50.0 ppb (38) 0.41 ppb (5) N/A N/A 38.0
 
March 18, 2019, 8 p.m. 16.0 ppb (15) 2.7 ppb (3) N/A 13.0 ppb (12) N/A N/A 43.0 ppb (33) 0.31 ppb (3) N/A N/A 33.0
 
March 18, 2019, 7 p.m. 18.0 ppb (17) 3.8 ppb (4) N/A 14.0 ppb (13) N/A N/A 42.0 ppb (32) 0.27 ppb (3) N/A N/A 32.0
 
March 18, 2019, 6 p.m. 25.2 ppb (23) 6.3 ppb (6) N/A 19.0 ppb (18) N/A N/A 34.0 ppb (26) 0.3 ppb (3) N/A N/A 26.0
 
March 18, 2019, 5 p.m. 45.7 ppb (42) 15.7 ppb (15) N/A 30.0 ppb (28) N/A N/A 23.0 ppb (18) 0.39 ppb (4) N/A N/A 42.0
 
March 18, 2019, 4 p.m. 102.2 ppb (100) 56.4 ppb (53) N/A 46.0 ppb (43) N/A N/A 11.0 ppb (8) 0.74 ppb (8) N/A N/A 100.0
 
March 18, 2019, 3 p.m. 118.1 ppb (103) 72.9 ppb (70) N/A 45.0 ppb (42) N/A N/A 6.0 ppb (5) 0.93 ppb (10) N/A N/A 103.0
 
March 18, 2019, 2 p.m. 102.8 ppb (100) 65.0 ppb (62) N/A 38.0 ppb (35) N/A N/A 3.0 ppb (2) 1.08 ppb (12) N/A N/A 100.0
 
March 18, 2019, 1 p.m. 75.2 ppb (73) 41.1 ppb (38) N/A 34.0 ppb (31) N/A N/A 2.0 ppb (2) 0.87 ppb (10) N/A N/A 73.0
 
March 18, 2019, noon 46.8 ppb (43) 15.3 ppb (14) N/A 31.0 ppb (29) N/A N/A 3.0 ppb (2) 0.59 ppb (7) N/A N/A 43.0
 
March 18, 2019, 11 a.m. 28.5 ppb (26) 1.6 ppb (1) N/A 27.0 ppb (25) N/A N/A 9.0 ppb (7) 0.46 ppb (5) N/A N/A 26.0
 
March 18, 2019, 10 a.m. 27.4 ppb (25) 1.2 ppb (1) N/A 26.0 ppb (24) N/A N/A 11.0 ppb (8) 0.45 ppb (5) N/A N/A 25.0
 
March 18, 2019, 9 a.m. 31.9 ppb (30) 1.0 ppb (1) N/A 31.0 ppb (29) N/A N/A 11.0 ppb (8) 0.52 ppb (6) N/A N/A 30.0
 
March 18, 2019, 8 a.m. 33.2 ppb (31) 1.8 ppb (2) N/A 31.0 ppb (29) N/A N/A 9.0 ppb (7) 0.54 ppb (6) N/A N/A 31.0
 
March 18, 2019, 7 a.m. 44.6 ppb (41) 5.6 ppb (5) N/A 39.0 ppb (36) N/A N/A 5.0 ppb (4) 0.67 ppb (7) N/A N/A 41.0
 
March 18, 2019, 6 a.m. 36.3 ppb (34) 2.2 ppb (2) N/A 34.0 ppb (31) N/A N/A 9.0 ppb (7) 0.65 ppb (7) N/A N/A 34.0
 
March 18, 2019, 5 a.m. 34.9 ppb (32) 1.2 ppb (1) N/A 34.0 ppb (31) N/A N/A 13.0 ppb (10) 0.67 ppb (7) N/A N/A 32.0
 
March 18, 2019, 4 a.m. 32.8 ppb (30) 1.3 ppb (1) N/A 31.0 ppb (29) N/A N/A 18.0 ppb (14) 0.7 ppb (8) N/A N/A 30.0
 
March 18, 2019, 3 a.m. 25.5 ppb (24) 1.0 ppb (1) N/A 24.0 ppb (22) N/A N/A 28.0 ppb (22) 0.46 ppb (5) N/A N/A 24.0
 
March 18, 2019, 2 a.m. 20.3 ppb (19) 1.9 ppb (2) N/A 18.0 ppb (17) N/A N/A 37.0 ppb (28) 0.37 ppb (4) N/A N/A 28.0
 
March 18, 2019, 1 a.m. 11.7 ppb (11) -0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A 50.0 ppb (38) 0.34 ppb (4) N/A N/A 38.0
 
March 18, 2019, midnight 8.2 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 49.0 ppb (38) 0.23 ppb (3) N/A N/A 38.0
 
March 17, 2019, 11 p.m. 3.5 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.18 ppb (2) N/A N/A 38.0
 
March 17, 2019, 10 p.m. 4.2 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.19 ppb (2) N/A N/A 38.0
 
March 17, 2019, 9 p.m. 4.9 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 48.0 ppb (37) 0.19 ppb (2) N/A N/A 37.0
 
March 17, 2019, 8 p.m. 4.4 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) 0.19 ppb (2) N/A N/A 36.0
 
March 17, 2019, 7 p.m. 10.5 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A 42.0 ppb (32) 0.24 ppb (3) N/A N/A 32.0
 
March 17, 2019, 6 p.m. 15.7 ppb (15) 3.6 ppb (3) N/A 12.0 ppb (11) N/A N/A 34.0 ppb (26) 0.29 ppb (3) N/A N/A 26.0
 
March 17, 2019, 5 p.m. 18.2 ppb (17) 4.1 ppb (4) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) 0.31 ppb (3) N/A N/A 24.0
 
March 17, 2019, 4 p.m. 27.7 ppb (26) 8.0 ppb (7) N/A 20.0 ppb (19) N/A N/A 24.0 ppb (18) 0.38 ppb (4) N/A N/A 26.0
 
March 17, 2019, 3 p.m. 49.1 ppb (45) 20.3 ppb (19) N/A 29.0 ppb (27) N/A N/A 12.0 ppb (9) 0.56 ppb (6) N/A N/A 45.0
 
March 17, 2019, 2 p.m. 42.5 ppb (39) 13.9 ppb (13) N/A 29.0 ppb (27) N/A N/A 5.0 ppb (4) 0.5 ppb (6) N/A N/A 39.0
 
March 17, 2019, 1 p.m. 30.7 ppb (28) 3.2 ppb (3) N/A 28.0 ppb (26) N/A N/A 5.0 ppb (4) 0.44 ppb (5) N/A N/A 28.0
 
March 17, 2019, noon 30.7 ppb (28) 2.7 ppb (3) N/A 28.0 ppb (26) N/A N/A 6.0 ppb (5) 0.42 ppb (5) N/A N/A 28.0
 
March 17, 2019, 11 a.m. 20.7 ppb (19) 0.8 ppb (1) N/A 20.0 ppb (19) N/A N/A 12.0 ppb (9) 0.33 ppb (4) N/A N/A 19.0
 
March 17, 2019, 10 a.m. 18.7 ppb (17) 0.3 ppb (0) N/A 18.0 ppb (17) N/A N/A 16.0 ppb (12) 0.33 ppb (4) N/A N/A 17.0
 
March 17, 2019, 9 a.m. 22.1 ppb (20) 0.8 ppb (1) N/A 21.0 ppb (19) N/A N/A 14.0 ppb (11) 0.4 ppb (4) N/A N/A 20.0
 
March 17, 2019, 8 a.m. 24.6 ppb (23) 0.7 ppb (1) N/A 24.0 ppb (22) N/A N/A 12.0 ppb (9) 0.43 ppb (5) N/A N/A 23.0
 
March 17, 2019, 7 a.m. 28.0 ppb (26) 1.3 ppb (1) N/A 27.0 ppb (25) N/A N/A 13.0 ppb (10) 0.47 ppb (5) N/A N/A 26.0
 
March 17, 2019, 6 a.m. 36.7 ppb (34) 4.4 ppb (4) N/A 32.0 ppb (30) N/A N/A 9.0 ppb (7) 0.6 ppb (7) N/A N/A 34.0
 
March 17, 2019, 5 a.m. 34.2 ppb (32) 1.8 ppb (2) N/A 32.0 ppb (30) N/A N/A 14.0 ppb (11) 0.56 ppb (6) N/A N/A 32.0
 
March 17, 2019, 4 a.m. 40.7 ppb (38) 4.3 ppb (4) N/A 36.0 ppb (33) N/A N/A 15.0 ppb (12) 0.62 ppb (7) N/A N/A 38.0
 
March 17, 2019, 3 a.m. 29.8 ppb (28) 2.2 ppb (2) N/A 28.0 ppb (26) N/A N/A 25.0 ppb (19) 0.51 ppb (6) N/A N/A 28.0
 
March 17, 2019, 2 a.m. 18.8 ppb (17) 2.3 ppb (2) N/A 16.0 ppb (15) N/A N/A 34.0 ppb (26) 0.31 ppb (3) N/A N/A 26.0
 
March 17, 2019, 1 a.m. 3.1 ppb (3) -0.8 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.17 ppb (2) N/A N/A 35.0
 
March 17, 2019, midnight 2.6 ppb (2) -0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.16 ppb (2) N/A N/A 36.0
 
March 16, 2019, 11 p.m. 1.8 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.15 ppb (2) N/A N/A 38.0
 
March 16, 2019, 10 p.m. 1.8 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.15 ppb (2) N/A N/A 38.0
 
March 16, 2019, 9 p.m. 1.3 ppb (1) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.14 ppb (2) N/A N/A 38.0
 
March 16, 2019, 8 p.m. 1.2 ppb (1) -0.8 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.14 ppb (2) N/A N/A 38.0
 
March 16, 2019, 7 p.m. 1.2 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.14 ppb (2) N/A N/A 38.0
 
March 16, 2019, 6 p.m. 8.4 ppb (8) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (35) 0.25 ppb (3) N/A N/A 35.0
 
March 16, 2019, 5 p.m. 14.8 ppb (14) 3.6 ppb (3) N/A 11.0 ppb (10) N/A N/A 37.0 ppb (28) 0.29 ppb (3) N/A N/A 28.0
 
March 16, 2019, 4 p.m. 26.5 ppb (25) 7.6 ppb (7) N/A 19.0 ppb (18) N/A N/A 28.0 ppb (22) 0.4 ppb (4) N/A N/A 25.0
 
March 16, 2019, 3 p.m. 53.3 ppb (49) 21.5 ppb (20) N/A 32.0 ppb (30) N/A N/A 15.0 ppb (12) 0.68 ppb (8) N/A N/A 49.0
 
March 16, 2019, 2 p.m. 62.4 ppb (59) 24.8 ppb (23) N/A 38.0 ppb (35) N/A N/A 6.0 ppb (5) 0.71 ppb (8) N/A N/A 59.0
 
March 16, 2019, 1 p.m. 49.4 ppb (46) 12.3 ppb (11) N/A 37.0 ppb (34) N/A N/A 3.0 ppb (2) 0.53 ppb (6) N/A N/A 46.0
 
March 16, 2019, noon 42.5 ppb (39) 5.7 ppb (5) N/A 37.0 ppb (34) N/A N/A 4.0 ppb (3) 0.39 ppb (4) N/A N/A 39.0
 
March 16, 2019, 11 a.m. 35.0 ppb (32) 3.2 ppb (3) N/A 32.0 ppb (30) N/A N/A 8.0 ppb (6) 0.39 ppb (4) N/A N/A 32.0
 
March 16, 2019, 10 a.m. 39.1 ppb (36) 2.7 ppb (3) N/A 36.0 ppb (33) N/A N/A 7.0 ppb (5) 0.39 ppb (4) N/A N/A 36.0
 
March 16, 2019, 9 a.m. 33.8 ppb (31) 2.2 ppb (2) N/A 32.0 ppb (30) N/A N/A 11.0 ppb (8) 0.44 ppb (5) N/A N/A 31.0
 
March 16, 2019, 8 a.m. 45.6 ppb (42) 6.7 ppb (6) N/A 39.0 ppb (36) N/A N/A 5.0 ppb (4) 0.57 ppb (6) N/A N/A 42.0
 
March 16, 2019, 7 a.m. 56.8 ppb (53) 15.3 ppb (14) N/A 41.0 ppb (38) N/A N/A 3.0 ppb (2) 0.62 ppb (7) N/A N/A 53.0
 
March 16, 2019, 6 a.m. 53.5 ppb (50) 12.7 ppb (12) N/A 41.0 ppb (38) N/A N/A 4.0 ppb (3) 0.6 ppb (7) N/A N/A 50.0
 
March 16, 2019, 5 a.m. 65.2 ppb (62) 21.0 ppb (19) N/A 44.0 ppb (41) N/A N/A 3.0 ppb (2) 0.75 ppb (8) N/A N/A 62.0
 
March 16, 2019, 4 a.m. 49.3 ppb (46) 8.7 ppb (8) N/A 41.0 ppb (38) N/A N/A 6.0 ppb (5) 0.58 ppb (6) N/A N/A 46.0
 
March 16, 2019, 3 a.m. 33.7 ppb (31) 4.7 ppb (4) N/A 29.0 ppb (27) N/A N/A 16.0 ppb (12) 0.44 ppb (5) N/A N/A 31.0
 
March 16, 2019, 2 a.m. 11.8 ppb (11) -0.3 ppb (0) N/A 12.0 ppb (11) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A N/A 27.0
 
March 16, 2019, 1 a.m. 5.4 ppb (5) -0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.19 ppb (2) N/A N/A 33.0
 
March 16, 2019, midnight 5.5 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.22 ppb (2) N/A N/A 33.0
 
March 15, 2019, 11 p.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.19 ppb (2) N/A N/A 34.0
 
March 15, 2019, 10 p.m. 1.3 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.15 ppb (2) N/A N/A 35.0
 
March 15, 2019, 9 p.m. 8.0 ppb (7) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 45.0 ppb (35) 0.19 ppb (2) N/A N/A 35.0
 
March 15, 2019, 8 p.m. 8.5 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A N/A 44.0 ppb (34) 0.2 ppb (2) N/A N/A 34.0
 
March 15, 2019, 7 p.m. 7.4 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.21 ppb (2) N/A N/A 33.0
 
March 15, 2019, 6 p.m. 10.8 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.24 ppb (3) N/A N/A 30.0
 
March 15, 2019, 5 p.m. 15.5 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A 36.0 ppb (28) 0.23 ppb (3) N/A N/A 28.0